Customer Reviews

Topeak Topeak Presta Valve Extender Standard
3.3
5
89
89

Very versatile and easy to use
I've read both good and bad reviews but as far as I know now, my experience with it is good (little use at the moment but good perspectives).
Very versatile and easy to use.
Just screw it over the valve without putting out the core valve and pump it.
The only little problem is when trying to put it out because I have to unscrew it carefully and until I have more practice, I need a couple of attempts.
01 July 2010

Very Poor
Lasted about 3 uses - as per previous reviews, threads became damaged on first use as it was necessary to tighten a fair bit to prevent leakage.
On 3rd or 4th use, it failed completely and actually blew apart into 3 pieces.
I was only aiming for 120psi in the tyres - this is a totally unacceptable level of performance.
18 June 2010

Great Product
Worked really well. Nice that is can be added and removed easily keeping existing valve intact.
06 August 2014

Avoid like the plague
In order to describe how utterly woeful this product is, you will have to forgive the artistic licence, but please try to imagine the following -
You are trying to stretch a hosepipe made of cheese over a cricket bat. Whilst the bat is spinning and tumbling and you are drunk, blindfolded and are being tickled by a billion feathers.
You have more chance of stretching that pipe over that bat than you have of getting this valve extender to work on a Presta valve.
You would get more air in the tyre by wrapping the £5 note you would spend on this junk round the valve and using a trumpet to inflate the tyre.
Basically, DO NOT BUY this.
21 July 2014

Answers

Answer:

Yes, it works with non removable core valves. You keep your normal valve as it is and this screws over the top just for pumping purposes. Can then be unscrewed for your ride (so good for aerodynamics). Just make sure you leave the valve open when you fit your tub / tube!

Yes you can use these with non-removable valve cores but pumping your tyre up requires access to the core so you can unscrew and tighten up the valve when required, so successfull pumping does depend on the amount of valve showing over the rim.

Answers

Yes - I use the Innovate Microflate nano CO2 pump. No issues. You get a really good seal with these which is important as you only get one chance to get it right really. Much better than with the Zipp valve extender I used before and no messing about with tape.